What is fertilisation? Distinguish between external fertilisation and internal fertilisation.
Answers
Answer:
Complete answer: Internal fertilization is the process when the syngamy (union of male and female gamete) occurs inside the female body after insemination using copulation. In contrast, External fertilization is the syngamy outside the female body, that is in the outer environment especially in water bodies.
Answer:
In internal fertilisation, the eggs and sperm are released out of the body of the organism. The act of fusion or fertilisation takes place outside the body of a female. The zygote is produced externally.
External fertilisation is generally seen in aquatic animals or those that live close to water bodies. In this type of fertilisation, millions of gametes are produced and released into the water. The sperm swims freely in the water and when it encounters an egg cell, it fertilises the egg which leads to the development of the zygote. The main criteria for this type of fertilisation to be successful is that the gametes have to be produced in large numbers, because, there are always high chances of them getting eaten by fish or getting washed away by water currents and rainfall. As such not all gametes get involved in fertilisation; and even if they do so, not every zygote may survive to ultimately reach adulthood.
sorry, it took too much time to write this whole explanation!!!
may u mark me as BRAINIEST